CN204396598U - Slab ratchet fine blanking die - Google Patents

Abstract

The utility model discloses a thick plate ratchet fine blanking die, which comprises a fixed plate, a convex and concave mold fixed on the fixed plate, a concave mold frame set opposite to the fixed plate, a concave mold installed on the concave mold frame, a The push plate on the mold, the backing plate fixed on the fixed plate, and the ring gear plate under the backing plate, wherein the profile of the end face of the convex and concave dies facing the die is the same as the profile of the thick plate pawl to be processed, and the concave The inner shape of the mold is the same as the outer contour of the thick plate pawl to be processed. The inner shape of the die includes straight lines, convex parts and concave parts. The edge where the straight line is located is provided with rounded corners. There is a chamfer at the edge, and a comprehensive chamfer formed by rounded corners and chamfers is provided at the cutting edge where the concave part is located. The thick plate pawl fine blanking die realizes the fine blanking forming of the thick plate pawl, and at the same time ensures the deformation of the thick plate pawl after stamping the straight line part, the concave part and the convex part.

Description

Thick plate pawl fine blanking die

technical field

The utility model relates to the technical field of stamping die structure, in particular to a fine-blanking die for thick plate pawls.

Background technique

The thick plate pawl is used for an electrical switch part, the thickness is greater than or equal to 7mm, the part includes many small holes, and the hole margin is small. Generally, fine blanking is used to reduce costs and increase efficiency, and the bright belt requires more than 90%. In order to obtain a good section quality, the traditional method is to round the die edge during mold manufacturing, or to chamfer a 30° bevel. However, in the case of the same chamfer, the degree of difficulty of deformation of each part of the part is different, and the quality of the section is also different. In addition, the protruding part of the part is most likely to be torn, while the straight part and concave part of the part are easy to reach, but they are prone to defects such as large collapse angle and large burrs.

In addition, the pawl part of the thick plate has the characteristics of many holes and small margins, and there is not enough area on the punch and die to process the threaded holes. If it is fixed by welding hanging table, it is difficult to manufacture and maintain; if it is fixed by screws in the conventional design method, it needs external coordinate grinding processing, and the manufacturing cycle is long and the cost is high.

Utility model content

The main purpose of the utility model is to provide a thick plate ratchet fine blanking die, aiming at realizing the fine blanking forming of the thick plate ratchet, and at the same time controlling the deformation of the thick plate ratchet straight part, concave part and convex part after stamping.

In order to achieve the above object, the utility model provides a thick plate ratchet fine blanking die, including a fixed plate, a convex and concave die fixed on the fixed plate, a die frame opposite to the fixed plate, installed on the A die on the die frame, a push plate positioned on the die, a backing plate fixed on the fixed plate, and a ring gear plate positioned under the backing plate, wherein the male and female dies face toward the The end surface profile of the die is the same as the profile of the thick plate pawl to be processed, the inner shape of the die is the same as the outer contour of the thick plate pawl to be processed, and the inner shape of the die includes a straight line, a convex The cutting edge where the straight part is located is provided with rounded corners, the cutting edge where the convex part is located is provided with chamfering, and the cutting edge where the concave part is located is provided with a comprehensive combination of rounded corners and chamfering. Chamfer.

Preferably, the thick-plate ratchet fine-blanking die further includes a convex-concave gasket located between the convex-concave die and the fixing plate.

Preferably, the male and female dies, the male and female die gaskets are detachably connected to the fixing plate.

Preferably, the thickness of the convex-concave gasket is 4-8mm.

Preferably, the cutting edge where the straight line part is located is provided with a rounded corner with a diameter of 0.05S-0.08S, wherein S is the thickness of the thick plate pawl.

Preferably, the cutting edge where the protrusion is located is provided with a 30° chamfer and the length of its long straight side is 0.05S~0.08S.

Preferably, the cutting edge where the concave part is located is provided with a rounded corner with a diameter of 0.05S~0.08S and a comprehensive chamfer formed by a 30° chamfer, and the length of the short straight side of the chamfer at the cutting edge where the concave part is located is 0.05S ~0.08S.

Preferably, a boss is provided on the end surface of the male and female dies close to the fixing plate, and a threaded hole is provided on the boss.

The thick plate ratchet fine-blanking die proposed by the utility model is provided with rounded corners at the cutting edge where the straight part of the die is located, chamfered at the cutting edge where the convex part is located, and rounded at the cutting edge where the concave part is located. The comprehensive chamfer formed by the corner and chamfer, that is, the cutting edge of the die is treated differently according to the structural characteristics of the thick plate pawl, so as to ensure the deformation of the straight part, concave part and convex part of the thick plate pawl after stamping Quantity, so that the thick plate pawl not only has a smooth blanking surface, avoiding tearing, but also has moderate burrs and collapse angles, and the structure of each part is stable.

Description of drawings

Fig. 1 is the structure schematic diagram of the preferred embodiment of the fine-blanking die of the thick plate pawl of the present invention;

Fig. 2 is a structural schematic diagram of a thick plate pawl punched out by using the thick plate pawl fine blanking die;

Fig. 3 is a schematic structural view of the end face of the male and female die shown in Fig. 1 near the fixed plate side;

Fig. 4 is the structural schematic diagram of the die shown in Fig. 1 near the end face of one side of the male and female die;

Figure 4-1 is a schematic structural view of the cutting edge of the inner straight portion of the die shown in Figure 1;

Fig. 4-2 is a structural schematic diagram of the inner convex part cutting edge of the die shown in Fig. 1;

Fig. 4-3 is the schematic view of the structure of the cutting edge of the inner concave part of the die shown in Fig. 1;

Fig. 5 is a detailed enlarged structural schematic diagram of place I shown in Fig. 1;

FIG. 6 is a schematic diagram of a detailed enlarged structure at II shown in FIG. 1 .

In the figure, 1-thick plate pawl, 2-fixing plate, 3-screw, 4-convex and concave die spacer, 5-convex and concave die, 51-boss, 52-threaded hole, 6-gear plate, 7-bar Material, 8-die, 81-inner shape, 801-straight line, 802-convex, 803-concave, 9-push plate, 10-die frame, 11-backing plate.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

It should be noted that, in the description of the present utility model, the terms "horizontal", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description , does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Referring to Fig. 1 and Fig. 2, Fig. 1 is a schematic structural diagram of a preferred embodiment of a fine-blanking die for a thick-plate pawl of the present invention; Fig. 2 is a schematic structural diagram of a thick-plate pawl punched out by using the fine-blanking die for a thick-plate pawl.

In this preferred embodiment, the thick plate ratchet fine blanking die includes a fixed plate 2, a convex and concave die 5 fixed on the fixed plate 2, a die frame 10 arranged opposite to the fixed plate 2, and a die frame installed on the die frame 10. Die 8, the push plate 9 positioned on the die 8, the backing plate 11 fixed on the fixed plate 2, and the ring gear plate 6 positioned under the backing plate 11, wherein the convex and concave die 5 faces the end surface profile of the die 8 and The profile of the thick plate ratchet 1 to be processed is the same, the inner shape 81 of the die 8 is the same as the outer contour of the thick plate ratchet 1 to be processed, and the inner shape 81 of the die 8 includes a straight line portion 801, a convex portion 802 and The cutting edge of the concave part 803 and the straight part 801 are rounded, the cutting edge of the convex part 802 is chamfered, and the cutting edge of the concave part 803 is rounded and chamfered. The end surface profile of the convex and concave die 5 near the die 8 is 0.5% smaller than the thickness of the thick plate pawl 1 on one side of the profile of the thick plate pawl 1 . Referring to Fig. 2, the thickness of the thick plate ratchet 1 is ≥ 7mm (7mm in this embodiment), and the thick plate ratchet 1 includes a linear part A, a convex part B and a die C.

Specifically, referring to Figure 4-1, the edge of the straight line 801 is provided with rounded corners and its diameter (R shown in Figure 4-1) is 0.05S~0.08S (this embodiment takes 0.05S), where S is the thickness of the thick plate pawl 1 . The cutting edge where the convex part 802 is located is provided with a 30° chamfer and its long straight side (that is, m shown in Figure 4-2) has a length of 0.05S~0.08S (this embodiment takes 0.05S). The cutting edge where the concave part 803 is located is provided with a rounded corner with a diameter of 0.05S~0.08S (R shown in Figure 4-3, 0.05S in this embodiment) and a comprehensive chamfer formed by a 30° chamfer. The cutting edge where the concave part 803 is located The length of the short straight side of the chamfer at 0 (that is, h shown in Figure 4-3) is 0.05S~0.08S (0.05S is used in this embodiment). The cutting edge of the inner shape 81 of the die 8 is set according to the above-mentioned range, which can ensure the quality of the punched thick plate pawl 1 .

The working process of the thick plate pawl fine blanking die is as follows: the pawl fine blanking die is assembled on the fine blanking machine as required, the strip 7 is covered by the gear ring plate 6, the convex and concave die 5, the die 8, the die frame 10 and the push plate 9 After pressing, the thick plate pawl 1 is formed under the state of three-dimensional compressive stress, as shown in FIG. 1 . The convex part of the thick plate ratchet 1 is easy to tear, so the cutting edge of the concave part 803 of the corresponding die 8 is provided with comprehensive chamfering as shown in Figure 4-3 to reduce the degree of deformation of the material in the deformation zone and avoid tearing In order to obtain a smooth blanking surface, the material flow in the deformation zone is shown in Figure 5. The cutting edges at the straight line portion 801 and the convex portion 802 of the die 8 are respectively provided with rounded corners and beveled corners as shown in Figures 4-1 and 4-2 to ensure that the deformation of the strip 7 is moderate. The blanking surface, and the size of the burr and the collapse angle are moderate, and the flow direction of the material in the deformation zone is shown in Figure 6.

The thick plate ratchet fine blanking die proposed in this embodiment is provided with rounded corners at the cutting edge where the straight part 801 of the die 8 is located, chamfering is provided at the cutting edge where the convex part 802 is located, and a chamfer is provided at the cutting edge where the concave part 803 is located. There is a comprehensive chamfer formed by rounded corners and chamfers, that is, according to the structural characteristics of the thick plate pawl 1, the cutting edge of the die 8 is treated differently, so as to ensure the straight line and concave parts of the thick plate pawl 1. The amount of deformation after stamping and the convex part makes the thick plate pawl 1 not only have a smooth punching surface, avoiding the generation of tearing, but also have moderate burrs and sagging angles, and at the same time, the structure of each part is stable.

Further, referring to FIG. 1 , the thick plate pawl fine blanking die also includes a punch and die gasket 4 located between the punch and die 5 and the fixing plate 2 . The punch and die 5, the punch and die gasket 4 and the fixing plate 2 are detachably connected, specifically, the punch and die 5, the punch and die gasket 4 and the fixing plate 2 can be connected by threads, so as to facilitate the replacement of the punch and die according to the grinding degree of the punch and die 5 Gasket 4. The thickness of the punch gasket 4 is 4-8mm.

The convex and concave die gasket 4 is used to adjust the assembly height of the thick plate pawl fine blanking die. After the chipping of the convex and concave die 5 is partially ground, it is only necessary to replace the convex and concave die gasket 4 with increased thickness. In this embodiment, the initial thickness of the convex and concave mold gasket 4 is 4 mm.

Further, referring to FIG. 1 and FIG. 3 , a boss 51 is provided on the end surface of the convex and concave die 5 close to the fixing plate 2 , and a threaded hole 52 is provided on the boss 51 . The convex and concave mold 5 is threadedly connected with the fixed plate 2, and the screw 3 passes through the threaded hole 52 on the fixed plate and the convex and concave mold 5 to connect the two. Because the size of the thick plate ratchet 1 is small, the area available for setting the threaded hole 52 on the convex and concave mold 5 is too small. Therefore, in this embodiment, setting the boss 51 on the convex and concave mold 5 is beneficial to the convex and concave mold 5. It is firmly installed on the fixed plate 2.

The above are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. All equivalent structural transformations made by using the description of the utility model and the contents of the accompanying drawings are directly or indirectly used in other related technical fields. All are included in the scope of patent protection of the utility model in the same way.

Claims (8)

1. a thick plate ratchet fine blanking die, it is characterized in that, comprise fixed plate, be fixed on the male and female mold on described fixed plate, the die frame that is arranged oppositely with described fixed plate, be installed in described die frame The die on the top, the push plate on the die, the backing plate fixed on the fixed plate, and the ring gear plate under the backing plate, wherein the male and female dies face the The profile of the end surface is the same as that of the thick plate pawl to be processed, the inner shape of the die is the same as the outer contour of the thick plate pawl to be processed, and the inner shape of the die includes a straight line, a convex portion and a concave portion , the cutting edge where the straight line part is located is provided with rounded corners, the cutting edge where the convex part is located is provided with chamfering, and the cutting edge where the concave part is located is provided with a comprehensive chamfer formed by rounded corners and chamfering. 2. The thick plate pawl fine blanking die according to claim 1, further comprising a gasket between the convex and concave dies and the fixing plate. 3. The thick plate pawl fine blanking die according to claim 2, characterized in that the male and female dies, the male and female die gaskets and the fixing plate are detachably connected. 4. The thick-plate pawl fine-blanking die according to claim 2, wherein the thickness of the convex-concave die gasket is 4-8mm. 5. The thick plate pawl fine blanking die according to claim 1, characterized in that, the cutting edge where the straight line part is located is provided with a rounded corner and its diameter is 0.05S~0.08S, wherein S is the thickness The thickness of the plate detents. 6. The thick plate pawl fine blanking die according to claim 5, characterized in that, the cutting edge where the convex part is located is provided with a 30° chamfer and the length of its long straight side is 0.05S~0.08S. 7. The thick plate pawl fine blanking die according to claim 5, wherein the cutting edge where the recess is located is provided with a comprehensive chamfer formed by a rounded corner with a diameter of 0.05S~0.08S and a 30° chamfer, The length of the short straight side of the chamfer at the cutting edge where the recess is located is 0.05S-0.08S. 8. The thick plate pawl fine blanking die according to any one of claims 1 to 7, characterized in that, the end surface of the convex and concave dies close to the fixed plate is provided with a boss, and the boss is provided with Threaded hole.